A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
Prismatic Chevrons Pattern 5 With Background
Source GDJ
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
From a drawing in 'Az Osztrák-Magyar Monarchia irásban és képben', 1885.
Source Firkin
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Colour version of the original pattern.
Source Firkin
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Inspired by a JPG that was uploaded to Pixabay by kokon_art
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen